Smoke-consuming furnace.



E. STANLEY. SMOKE CONSUMING FURNACE. APPLICATION FILED DEC.5, 190a.

Patented Apr. 20, 1915.

THE NORRIS PETERS c0. PHOTO-LITHQ, WASHINGTON. n. C.

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ENDS STANLEY, OF WATERTOWN, SOUTH DAKOTA.

SMOKE-CONSUMING FURNACE.

Application filed December 5, 1908.

To all whom it may concern Be it known that I, Enos STANLEY, a citizen of the United States, residing at Watertown, in the county of Goddington and State of South Dakota, have invented a certain new and useful Smoke-Consuming Furnace, of which the following is a specification.

The object of my invention is to provide a furnace of simple, durable and inexpensive construction, designed for supplying hot air to a building and so arranged that the combustion chamber is supplied with fresh heated air in quantities sufficient for burning up smoke and soot, and further to apply said air in position where it will be directly in contact with the fuel upon the grate, both above the fuel and through the body of the fuel on the grate.

A further object is to provide means for supplying steam or vapor from a body of Water to be commingled with said current of air for the purpose of aiding in combustion.

My invention consists in the construction, arrangementand combination of the various parts of the device whereby the objects contemplated are attained as hereinafter more fully set forth, and pointed out in my claims, and illustrated in the accompanying drawings, in which Figure 1 shows a sectional view through the furnace walls and a side elevation of the furnace proper, parts of which are broken away to show the interior construction. Fig. 2 shows an enlarged, detail, sectional view illustrating the means for forming gas tight connections between the furnace dome and heating drum. Fig. 3 shows an enlarged, detail, sectional view illustrating the means for forming gas tight joints between the top and sides of the furnace dome, and Fig. 4 shows an enlarged, detail sectional view illustrating one of the joints in the furnace surrounding the combustion chamber.

' Referring to the accompanying drawings, T have used the reference numeral 10 to indicate the furnace casing.

At the bottom of the casing is a water tank 11 which may be made of cement or other material and which is of a size to completely cover the bottom of the furnace within the casing 10.

- Arranged above the tank 11 is an ash pit 12 of the furnace having a grate 18 at its top. Above the grate is a fire pot composed Specification of Letters Patent.

Patented Apr. 29, 1915.

Serial No. 466,186.

of circular sections 14:. The means for conmeeting these sections together to form gas tlght joints is illustrated in Fig. 1. At the top of one of the sections 14: is an annular groove having its inner wall beveled upwardly and inwardly. The lower edge of .each of the sections 1 1 is provided with a beveled portion 15 at its inner corner and with a shoulder 16 at the top of said beveled portion. This beveled portion is designed to fit against the inclined inner wall of the groove in the section part below it, as clearly shown 1n Fig. 1, and the space between the outer wall of the upper section 14: and the outer wall of the groove in the lower section is filled with a packing material 17 such, for instance, as asbestos. By this construction it is obvious that there may be considerable expansion and contraction of either one of the sections 141: relative to the other without breaking the gas tight connection.

Above the fire pot is the combustion chamber comprising a cylindrical body portion 18 and a dome shaped top 19. The connection between the top 19 and the body por tion 18 is illustrated in Fig. 3 and consists of an annular ring 20 secured by rivets 21 to the inner wall of the body portion 18 near the top thereof. The top edge of the part 18 has an inwardly projected flange 22 at its top. The top 19 rests upon the annular ring 20 and is provided with two shoulders 23 and 2 1-, the first being designed to receive the flange 22 and the second to receive a packing material 25. The flange 22 serves the function of holding the packing material 25 in position and, obviously, the parts 18 and 19 may contract or expand relative to each other without disturbing the gas tight joint formed by the packing material.

The means for supplying fresh air to the combustion chamber comprises a pipe 26 having one open end at the furnace front near its top, said pipe being extended inwardly and then downwardly through the dome, and having its other end open and positioned directly on top of the grate 13. In this way fresh air is drawn into the ash pit and it is heated while passing through the dome to the combustion chamber. In order to distribute this fresh air throughout the combustion chamber and to place it at the points where it will be most effective in producing perfect combustion, I provide a cylinder 27 spaced apart from and surrounding the lower end of the pipe 26 and of the pipe 33.

having an open bottom supported above the grate. The sides of the cylinder are provided with vertical slots 28 and the top 29 of the cylinder extends to the pipe 26 and thus closes the top.

Assuming that the fire pot is filled with burning fuel surrounding the cylinder 27, then the air drawn through the pipe 26 will first pass through the grate and then will go upwardly into the interior of the cylinder 27 as there will be less resistance to the air at this point than through the grate and the fuel on the grate. The fresh air will pass out through the slots 28 and come in direct contact with the burning fuel and will also pass out through the slots 28 above the fuel so that all the combustible material arising from the fire will be supplied with fresh air after it rises from the fire so that it will freely burn and thus consume the gases and smoke.

The body portion 18 is provided with a passage Way 30 through which fuel may be introduced and the ash pit 12 is provided with a passage way 31 through which the ashes may be removed.

In order to provide a small amount of steam or vapor to be commingled with the air that is fed to the fire, I provide a Water tank 32 near the top of the furnace and adjacent to the body portion 18 and arranged to communicate with the pipe 26 by means This tank may be filled through the pipe 34 which extends beyond the furnace front. In this way the water in the tank 32 will be heated and the vapor or steam arising therefrom will commingle with the air in the pipe 26.

At the rear of the body portion 18 is a heating drum 35 communicating with the body portion 18 by means of the pipe 36. I

' provide for forming air tight connections between the combustion chamber and the heating drum 35 as follows: Referring to Fig. 2 of the drawings it will be seen that the opening in the combustion chamber is surrounded by an outwardly projected flange 37. The pipe 36 is made in two sections. The end adjacent to the combustion chamber is formed with an outwardly projecting flange 38 having a shoulder therein terial 39 in position and designed to receive a packing material 39, which packing material lies between the flange 37 and the interior of the pipe 36. I connect the flange 38 with the dome by means of the bolts 40. In this way the flange 37 is made to retain the packing masaid packing material prevents leakage of gas.

The connection between the pipe 36 and the heating drum 35 is the same as the connection before described. The said pipe 36 is made in two sections the adjacent ends of which are provided with outwardly extended flanges 41, each flange having two annular grooves therein. In said annular grooves, I place the packing material 42 and the flanges are connected with each other by the bolts 43.

In the rear of the heating drum is a vertical pipe 4.1 connected at its top with the drum 35 by means of the pipe 45 and at its bottom by means of the pipe 46. In the pipe 45 is a damper controlled by a rod 47 whereby either a direct or an indirect path for the products of combustion may be had. Communicating with the pipe 44 near its upper and lower ends respectively are discharge pipes 44 and 4:4 In the pipe 45 is a damper 45 Then said damper is closed, the products of combustion are discharged through the pipe 46, a portion of the pipe 44 and the pipe 4A". When the damper is open, the products of combustion are discharged through the ipe 45 across the pipe 44 and through the pipe 44.

Fresh air is introduced into the interior of the furnace casing 10 through the pipe 48 and heat arising from the space within the furnace walls is discharged through the pipe 49.

I claim as my invention:

1. In a furnace, the combination of a fire pot, a grate therein, a combustion chamber mounted on the fire pot, a fresh air pipe eX-, tended downwardly through the combustion chamber and the fire pot and arranged to discharge downwardly through the grate, and a casing surrounding the lower end of said pipe and closed at its top and open at its bottom, and having openings in its sides for the purposes stated.

2. In a furnace, the combination of a fire pot, a grate therein, a combustion chamber, an open-ended pipe leading from a point exterior to the furnace and downwardly through the fire pot to the grate and arranged to discharge fresh air downwardly through the grate, a cylinder resting upon the grate and surrounding the said pipe and spaced apart from it, and a top for the cylinder, said cylinder having slotted sides and being of a height substantially the same as that of the part of the combustion chamber designed to receive fuel.

3. In a device of the class described, the combination of a wall inclosing a combustion chamber, an upward extension of said wall, a cover on said upward extension a fire pot below the combustion chamber, a grate in the fire pot, a fresh air supply pipe extending from a point outside the combustion chamber through said combustion chamber and said fire pot to the said grate, a water tank outside of and near said combustion chamber, in a position to be heated therefrom, means for connecting the upper part of said water tank with said air supply pipe, and a cylinder open at its lower end and closed at the top, and surrounding and spaced apart from the lower portion of said fresh air pipe and constructed With a plurality of spaced openings, designed to permit the passage of air into and above the fuel bed.

4. In a furnace, the combination of a fire pot, a combustion chamber, a grate in the fire pot, an air supply pipe extending from Without the furnace into close proximity to the grate to discharge air therethrough, and a cylinder surrounding the lower portion of the said pipe and spaced therefrom, the

lower end of the cylinder being in close proximity to the grate to exclude fuel from entering the portion of the grate Within the cylinder, said cylinder extending to a plane above the fuel bed and provided with openings to permit passage of air into and above the bed of fuel.

ENOS STANLEY.

Witnesses RALPH ORWIG, MILDRED GoLDIzEN.

G'opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

